I have a Art Carr 10 inch converter for sale. I got it and decided to go with a new unit. It is a 26 spline big bolt pattern. Flashed to 3200. Was a $500 dollars new. $175.00 plus shipping. Thanks!
You will have to look at the splines on the input shaft. This would require having the tranny out or motor out. The 26 splines are 1970 and newer C4's or dipstick in the case models.